Hagens Berman Sobol Shapiro LLP today announced that it is investigating concerns by hedge funds and institutional investors who believe Bank of America Corp. (NYSE: BAC) may have failed to disclose to investors the risk associated with a $10 billion lawsuit threat from American International Group (“AIG”) (NYSE: AIG).

According to reports, AIG invested in billions of dollars of mortgage-backed securities sold by Bank of America prior to the housing collapse. In January 2011, after analyzing data from hundreds of thousands of loans, AIG reportedly informed the bank that it felt the risk of the securities had been misrepresented and was prepared to sue the banking giant for more than $10 billion.

Hagens Berman is investigating whether Bank of America failed to disclose fully the risks of its dispute with AIG. According to media reports, the bank did not mention the threat of the lawsuit in its quarterly regulatory filing, which was issued four days before AIG’s lawsuit was filed.

“We believe that Bank of America knew, or should have known, that its dispute with AIG represented a significant risk for investors,” said Partner Reed R. Kathrein, who is leading the firm’s investigation from its San Francisco office. “If the company did indeed fail to disclose such a risk, it could represent a major breach of the securities laws.”

On August 8, 2011, after several months of negotiations, AIG filed its lawsuit. Bank of America shares fell sharply, losing 20 percent of their value.

Institutional investors and others who purchased Bank of America common stock between May 5, 2011 and August 8, 2011, and who have losses exceeding $1,000,000 as a result of BAC’s stock drop on August 8, 2011, are encouraged to contact the firm. Reed R. Kathrein can be reached at (206) 623-7292 or via email at CCME@hbsslaw.com. Investors can also learn more about this investigation at www.hbsslaw.com/BACsecurities.

Top Bank of America Corp lawyers knew as early as January that American International Group Inc was prepared to sue the bank for more than $10 billion, seven months before the lawsuit was filed, according to sources familiar with the matter.

Bank of America shares fell more than 20 percent on August 8, the day the lawsuit was filed, adding to worries about the stability of the largest U.S. bank. It wasn’t until Warren Buffett stepped up with a $5 billion investment that those fears were eased, though hardly eliminated.

By Matt Phillips

Doubtless, historians will be going over the mammoth 2,200 page report from the Lehman bankruptcy examiner for years to come.

But we bloggers are writing the first draft now. And there’s plenty of good fodder on Lehman’s final days, including fresh details on its effort to get support from billionaire investor Warren Buffett.

Now, it’s well known that Lehman reached out to Buffett in its final months. The Journal’s Scott Patterson wrote about the Oracle’s decision to pass on Lehman in a story back in December.

But the level of detail provided by this report is pretty astounding. It offers a pretty amazing snapshot of Buffett’s conversation with Lehman CEO Dick Fuld as well as a remarkable window on how the Oracle negotiates during times of crisis.

The report really reads like a novel, so we’ll just give you the sections here:

Fuld and Buffett spoke on Friday, March 28, 2008. They discussed Buffett investing at least $2 billion in Lehman. Two items immediately concerned Buffet during his conversation with Fuld. First, Buffett wanted Lehman executives to buy under the same terms as Buffett. Fuld explained to the Examiner that he was reluctant to require a significant buy?in from Lehman executives, because they already received much of their compensation in stock. However, Buffett took it as a negative that Fuld suggested that Lehman executives were not willing to participate in a significant way. Second, Buffett did not like that Fuld complained about short sellers. Buffett thought that blaming short sellers was indicative of a failure to admit one’s own problems.

Following his conversation with Buffett, Fuld asked Paulson to call Buffett, which Paulson reluctantly did. Buffett told the Examiner that during that call, Paulson signaled that he would like Buffett to invest in Lehman, but Paulson “did not load the dice.” Buffett spent the rest of Friday, March 28, 2008, reviewing Lehman’s 10?K and noting problems with some of Lehman’s assets. Buffett’s concerns centered around Lehman’s real estate and high yield investments, lending?related commitments derivatives and their related credit?market risk, Level III assets and Lehman’s securitization activity. On Saturday, March 29, 2008, Buffett learned of a $100 million problem in Japan that Fuld had not mentioned during their discussions, and Buffett was concerned that Fuld had not been forthcoming about the issue. The problems Buffett saw in the 10?K along with Fuld’s failure to alert Buffett to the issue in Japan cemented Buffett’s decision not to invest in Lehman.

At some point in their conversations, Fuld and Buffett also discovered that there had been a miscommunication about the conversion price. Buffett was interested only in convertible preferred shares. Buffett told Fuld that he was willing to agree to a $40 conversion price per share, while Fuld thought Buffett was offering to buy in at “up? 40,” or 40% above the current market price, which would have been about $56 per share. On Friday, March 28, 2008, Lehman’s stock closed at $37.87. Fuld spoke to Lehman’s Executive Committee and several Board members about his conversations with Buffett. Lehman recognized that an investment by Buffett would provide a “stamp of approval.” However, Lehman already had better offers for its April capital raise, and Lehman did not think it could give a better deal to Buffett at the same time it gave a less attractive deal to others. On Monday, March 31, 2008, before Buffett could tell Fuld that he was not interested, Fuld called Buffett to say that Lehman could not accept his terms.

Last?Ditch Effort with Buffett

[Hugh “Skip” E. McGee, III, the head of Lehman’s Investment Banking Division] contacted [President David L. Sokol, president of Berkshire Hathaway’s MidAmerican Energy] again in late August or early September 2008 and outlined Lehman’s “Gameplan” for survival, specifically SpinCo. During a subsequent telephone call with Sokol, McGee explained the “good bank/bad bank” scenario and stated that Lehman would need an investor. Sokol believed the e?mail and call were intended to induce Sokol to pass that information on to Buffett, so Sokol briefed Buffett on SpinCo. Buffett thought the idea would not solve Lehman’s problems.

Sometime during the week prior to Lehman’s bankruptcy, McGee again reached out to Sokol with what both Sokol and McGee described to the Examiner as a “Hail Mary” pass. McGee asked, “Do you have any ideas to save us?” Sokol, who was bear hunting in Alaska at the time, told McGee that he did not.

Judging by the inclusion of the largely irrelevant bear hunting detail at the end, we can tell that this report was written by a frustrated novelist. (And they did an amazing job.) But what we find most remarkable is the insight these sections offer on how Buffett assesses companies.

It’s simple–but not easy–as he combines 10-K analysis with probing questions to management.

Are they willing to put their own money at risk? Are they being upfront? Are they giving investors the full story?